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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 51, Number 5
JKCSEZ 51(5)
October 20, 2007

Title	Theoretical Study on the Effects of Particle Size Distribution on the Optical Properties of Colloidal Gold 입자 크기 분포가 금 콜로이드의 광학성질에 미치는 영향에 대한 이론 연구
Author	Hyojeong Kim, Saha Leton Chandra, Joonkyung Jang 김효정, Saha Leton Chandra, 장준경
Keywords	표면 플라즈몬, 금 나노 입자, 소광 스펙트럼, 크기 분포, 미 이론 , Surface Plasmon Resonance, Gold Nanoparticle, Extinction Spectrum, Size Distribution, Mie Theory
Abstract	크기 분포를 가진 금 나노 입자 콜로이드의 소광 스펙트럼을 미 이론으로 계산하고 실험과 비교하였다. 입자 크기 분포를 고려한 계산이 크기 분포를 고려하지 않은 계산보다 실험과 더 가까움을 확인하였다. 최소 자승법을 이용하여 실험에서 얻은 소광 스펙트럼으로부터 입자 크기 분포를 이론적으로 도출하였다. 이렇게 얻은 입자 크기는 입자 지름이 10에서 28 나노미터인 경우 투과전자현미경 분석 결과와 잘 일치하였다. Mie theory has been used to calculate the extinction of a gold nanoparticle in water by varying its diameter from 1 to 1000 nm. Utilizing this size-dependent theoretical spectrum, we have calculated the extinction spectrum of a colloidal gold by taking into account the size distribution of particle. Such calculation is in better agreement with experiment than the calculation without considering the size distribution. A least-squares fitting is used to deduce the size distribution from an experimental extinction spectrum. For particles with their diameters ranging from 10 to 28 nanometers, the fitting gives reasonable agreement with the size distribution obtained from tunneling electron microscope images.
Page	407 - 411
Full Text	PDF

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